WO2007066814A1

WO2007066814A1 - Frame processing method and frame processing device

Info

Publication number: WO2007066814A1
Application number: PCT/JP2006/324885
Authority: WO
Inventors: Toshio Koide
Original assignee: Nec Corporation
Priority date: 2005-12-09
Filing date: 2006-12-07
Publication date: 2007-06-14
Also published as: JPWO2007066814A1; US8102847B2; CN101326770A; US20090245251A1; JP4863015B2

Abstract

When a data link layer frame whose destination address is a broadcast address is inputted from a tunneling destination via a decapsulating unit (202), a destination processing unit (201) generates a data link layer frame by replacing the destination address of the frame by one or more unicast address preset for the transmission source address by a table unit (205) and transmits it to a local network (11).

Description

Frame processing method and frame processing device

The present invention relates to a frame processing method and a frame processing apparatus, and more particularly, to a frame processing method and a frame processing apparatus capable of converting a broadcast frame multi-cast frame into a last frame and transmitting the same to a terminal.

:

In recent years, in the garden, there are many cases in which a household AN "a A e a N k AN" that includes electronic devices such as a game AV device (below), which is not only C, is added. Furthermore, through middle-and-low networks such as the Internet, you can continue to control these ends from outside and connect homes to share photos and videos with each other and play games in real time. There are also various services that are enjoyed.

In these services, it is important to secure communication with the authorized terminals in order to prevent unauthorized access to information. In order to secure the communication with the enabled terminal, it is necessary to provide tunneling for setting the communication tunnel at the end and connect the end with the communication tunnel as shown in 2. Assuming a typical domestic AN boundary, 3 cannot have tunneling to set up a communication tunnel with the other end 36 itself. In addition, it is a general environment where it is not possible to use AN's inspiration such as V ”AN. Therefore, as shown in many signals, a method is used in which equipment other than the terminal equipment uses tunneling to interconnect AN bodies. In AN, there are 33 connections to AN, and AN 1 is connected to a network such as the Internet via frame device 2. The frame processor 2 is equipped with tunneling 4 that sets up a communication tunnel. 3 is equipped with tunneling 2. Tunneler Set up a communication tunnel in the middle network between tunneling 2. This allows each of the 3 in the AN to be accessed from the 3 connected to the transit network 1 through the communication tunnel.

With this configuration, it is possible to limit the external terminals that can access the AN-connected terminals 3 and 3 to the terminal 3 that has set up the communication tunnel by the frame processing device. However, unlike in the case of 2, it is not possible to have a terminal group connected to AN, such as allowing communication between 3 and not allowing communication with 3. In frame device 2, if the address of the net frame sent from 36 is the broadcast address multicast address, that frame must be sent to AN in order to reach 3. The reason is that it is received by 3 other than the handset 3 as well.

It is described in 3 56 (1) 2 363 7 (2) sent by the enabled terminal. This is a method of converting a packet transmitted by multicast to a last packet and transmitting it. It is applied to this frame processing device 2. The multicast multicast address of the packet is converted to the cast address of 3 and sent. However, although it is an effective method for this 1 P multicast packet, there is little information that presupposes the use of multicast. This limits the fields of use. On the other hand, in an information and communication system that uses multicast, it is possible that a packet that could not be delivered by multicast address will be delivered by the last address, so the packet at the address cannot be processed.

In addition, there is another feature that sends data only to the authorized terminals. 98 2 (3). In this technique, the table retains compatibility with the multi-yast MAC dress and the last MAC dress. If the received AC frame is a multicast frame, the multicast MAC address is searched for the table, converted into an AC frame with the corresponding cast address, and transmitted. It is applied to this frame processing device 2. The multicast address of the MAC frame is converted to the multicast address of 3 and sent. However, in this method, since the cast MAC address is arbitrarily determined by the multicast AC address, when there are multiple external 3 connected to the framing device 2 due to the relay network 1, transmission from all of these partial terminals is performed. The converted cast frame will be converted to a cast frame in the same way. For this reason, it is not possible to carry out a specific proof, as if only a multicast MAC address from a specific department terminal was cast to a specific 3. Ming:

Problems that Ming is trying to solve:

As mentioned above, if the address of the net frame sent from the remote end is a flow-cast address multicast address, the net frame may be received and processed by other than the terminal. .

Even if the address of the net frame is a broad cast address multi-cast address, it is possible to use a terminal that does not use the "AN" conception of "V" AN and the like and is not specially processed at the end. It is intended to provide a frame processing method and a frame processing device for receiving and processing the communication.

To solve the problem

The frame management method related to Akira is from the network of For a data link frame in which the assigned address is a broadcast address, the upper child is obtained by replacing the address of the data link frame with each of the upper address of the child assigned to the address of the child data link frame. It has a step of converting to a tarin frame and outputting to the 2nd network.

The frame processing method has a step of receiving the network packet encapsulated by the network and encapsulating the received network packet to obtain the data link frame.

The frame management method has a step of outputting the data link frame whose address is outside the broadcast address to the second network as it is.

The frame management method is such that, for the child link frame received from the above-mentioned 2nd packet, when the set of address transmission addresses of the data link frame matches the predetermined set of address transmission addresses, The address of the data frame is a broadcast address

If the address matches the specified sending address, validate the data link frame, and discard the data link frame in other cases. If the address of the valid child talin frame is a broadcast address, A network packet encapsulation whose address is the upper tunneling address defined for the address of the frame, and if the valid data link frame address is not a broadcast address, for the set of address transmission addresses of the data link frame. It has a network packet capsule whose address is the tunneling address defined by the above, and the packet is sent to each of the above-mentioned towers.

The frame management method as described in (1) is connected to the two-way network of (1), and is the last data line address connected to the network of (2). Frame device which has a table part for holding a pair of a remote address which is a data link address connected to the network and a remote address which is a network address assigned to the network side of the tunnel device. A) in the frame management method in step a), receiving the network package encapsulated in a network and encapsulating the received network package to obtain a data link frame,

b) For the data link frame obtained in step a, if the address is a broadcast address, the previous mote address in the table is searched using the address of the data link frame, and the previous one on the matched pair is searched. The address of the data link frame is replaced by each cull address to generate the above frame, and each of them is transmitted to the above-mentioned two-tower network. Do

) Network data link frame is received, and the address of the child link frame that was received is used as the sending address of the full part, the previous motor address of the full part is searched, and if there is a mating group, and If the address of the child data link frame is a broadcast address and the previous address in the table is searched using the address as a match, and there is a matching pair, the data link frame is validated and the data link frame is discarded in other cases. Step,

d) When the address of the data link frame validated in step is a broadcast address, the previous address of the table part is searched using the address of the link link frame, and the tunneling of the pair of upper mating pairs is performed. The network packet with the address as the address, if the address of the child link frame validated in the previous step is not a broadcast address, the data link frame Address: A network packet cell that searches the above-mentioned full address before the full address with the sending address as the address, and uses the previous tunnel address of the set that is the address as the address, and a step for sending each packet to the above network. It is a feature.

Here, for the sake of efficiency, you may combine the processing of step a and step b, retain the results of the table part, and perform the search only once.

In the frame processing method, the data link frame is a net frame, the network packet is, the address is a broadcast address of the net, a master address, and the previous address of the table is the AC address. The full front address is a dress, the network is an intranet or the Internet capable of forwarding packets, and the network is an AN capable of forwarding Netframes or wireless AN. Is preferred.

In the frame processing method, the capsule type and the capsule used in the step d and the step e e. e HTT S, he e v e P e, "2T, he e O v e UDP h e e v e TCP.

The frame management device according to item 3 of the above description is arranged so that, for a data link frame whose address from the network is a broadcast address, the address of the data link frame is assigned to the address of the child link frame. Each of the above last addresses is converted to the above data link frame and output to the second network.

The frame processing device further receives one network encapsulated network packet and encapsulates the received network packet. And has a capsule part for obtaining the child link frame.

The processing unit outputs the data link frame whose address is outside the broadcast address as it is to the second network.

The frame processing device is

For the child link frame received from the above-mentioned 2nd network, if the address transmission address set of the data link frame matches the predetermined address transmission address set, and if the address of the data link frame is the broadcast address. When the address matches the specified sending address, the filter that validates the child link frame and discards the data link frame in other cases, the address of the valid child link frame is the broadcast address A network packet capsule whose address is one tunneling address defined for the address of the link link frame, and an address transmission address of the data link frame if the address of the valid data link frame is not a broadcast address. It has a network packet capsule whose address is the tunneling address defined for the group of addresses, and a capsule part which transmits each packet to the network.

The frame processing device related to Ming 4 is

In the frame processing device connected to the network of 1st network, the cal address that is the terminal link address that connects to the 2nd network of the network, and the data link address that connects to the cal network under the tunneling device. A remote address, a table that holds a pair of a tunneling address, which is a network address assigned to the network side of the tunneling device, and a network packet encapsulated in the above 1 network packet received and received. A cell part that encapsulates a tow packet to obtain a data link frame, If the address of the child link frame obtained in the encapsulation part is a broadcast address, the previous mote address in the table part is searched using the address of the data link frame as the previous cal address of the matched set. Generate the above frames by replacing the address of the child Tallinn frame and send each of them to the network of 2 above. Trust the science department,

When a child link frame is received from the above-mentioned 2nd network, the address of the received data link frame is used as the sending address of the table, the previous mote address of the table part is searched, and a matching address exists, and If the address of the transmitted data link frame is a broadcast address and the address of the table is searched for the previous address of the table part, and there is a set to be touched, the child link frame is enabled, and in other cases, the child link frame. The filter to discard

When the address of the child link frame validated by the filter section is a broadcast address, the previous address of the table section is searched by using the address of the data link frame as the matching tunneling address of the pair above. The network packet capsule as the address, if the address of the data frame that is valid in the filter section is not a broadcast address, the address of the link frame as the sending address of the previous mote address of the table section , And a network packet cell whose address is the set of pre-tunneling addresses that have been searched for, and a cell part which transmits each packet to the network.

For rationalization, the capsule stage and the stage may be combined as one stage and the results of the table part may be retained to facilitate the search.

The link link frame is a network frame, and the network The packet is a packet, the address is a broadcast cast address, a multicast address of, the front address of the full part is the AC address, the front tunneling address of the table part is the dress, and the gateway address is C is preferably an intranet or Internet capable of transferring frames, and the network of the above 2 is preferably an AN capable of transferring frames or a radio.

The capsule part and the capsule type and cell used in the capsule part are preferably either h e e v e HTTPS, e e v e e T P e h e e v e “UD, h e v e TCP.

A program related to item 5 of the above description sets the computer to the data link frame whose address is the broadcast address and the address of the data link frame to the address of the child link frame. It is intended to function as a stage for converting each of the above-mentioned stored addresses and converting it into the above-mentioned data frame and outputting to the network.

The program further causes the computer to function as a cell stage that receives the network packet of the network capsule of and receives the network packet and cells the received network packet to obtain the child link frame.

, Output the child linking frame whose address is out of the broadcast address as it is to the 2 tow.

The program

When the set of address transmission addresses of the data link frame of the child Tallin frame received from the above-mentioned network matches the predetermined set of address transmission addresses, and the child Tallin frame is received. When the address of the frame is a broadcast address and the address matches the specified sending address, the data link frame is validated and the other data link frames are discarded, and it functions as a filter stage.

If the address of the valid child link frame is a broadcast address, the upper tunneling address defined for the address of the data link frame is used as the address 1 The tow packet capsule, the address of the valid data link frame Is not a broadcast address, a network packet cell whose address is the tunneling address defined for the set of address transmission addresses of the data link frame, and each packet is made to function as the encapsulation stage for the above network. .

The program related to 6 of Ming is

, Which is the final link address that is connected to the network of the network 2 and that is connected to the above-mentioned network, and the remote address that is the final data link address that is connected to the network under the tunnel. A computer having a memory for storing a full memory which holds a pair with a tunnel address, which is a network address assigned to the tow side of the tunneling device,

It functions as an encapsulation stage that receives the network packet encapsulated in the network and receives the received network packet to obtain the data link frame.

If the address of the child link frame obtained in the cell stage is a broadcast address, the moto address in the table is searched using the address of the data link frame as Generate the upper frame by replacing the address of the data link frame with each of the cull addresses, If it is a child link frame that is out of the address broadcast address, it will function as the second network communication stage.

The child tally frame received from the network of the above 2 and received the address of the child link frame. The table's mote address is searched as the sending address. If there is a matching pair, and If the address of the data link frame is a broadcast address and there is a matching set that searches for the full cull address with the address as, the data link frame is validated, and in other cases, as a filter stage that discards the child link frame. Make it work,

If the address of the data link frame validated by the filter stage is a broadcast address, the cull address in the table is searched by using the address of the link link lame, and the tunnel tunnel address of the matched upper pair is addressed. In the above network packet capsule, if the address of the child tally frame validated by the filter stage is not a broadcast address, the address of the link link frame is used as the sending address of the table, and the local address of the table is searched. However, it functions as a network packet capsule whose address is the previous tunnel address of the set that has been switched, and a cell stage which transmits each packet to the network.

Here, for efficiency, the cell stages and the stages may be combined as one stage, and the full result may be retained to perform the search frequently.

The record / link frame is a net frame, the network packet is a packet, the address is a broadcast cast address of a net multicast address, and Address The mote address is a MAC address, the full front tunneling address is a dress, the network is an intra or internet capable of forwarding, and the network is capable of forwarding frames or wireless. I like being AN.

It is preferable that there is a difference between the capsule stage and the capsule type used in the capsule stage and the capsule, e P, e e v e HTT PS E e e v e e C ”2T E e e v e“ UDP e e v e TCP.

It was previously defined that for a data frame whose address obtained from the network is a broadcast address, refer to the address of that frame and allow the frame to be transmitted from that address. It works by converting to the last frame with the address at the end of the above and sending it to the second network.

Of Ming

According to the description, even if the address of the net frame is a floating cast address multicast address, it is possible to deal with a terminal that does not use the AN's conception such as VAN and does not require special processing. It is possible to provide a frame processing method and a frame processing device for performing the communication and processing. For the data link frame whose address is the broadcast address, the data link frame is converted to the last frame whose address is the end address on 1 defined for the address of the frame and sent to the network of 2. This is because A simple description of the face:

Figure 1 is a block diagram showing the network configuration when equipment other than the terminal uses the method of interconnecting AN bodies. Figure 2 is a block diagram showing the network configuration when the body uses the tunneling method to interconnect with other terminals.

Figure 3 is a block diagram showing the formation of a tow body in the state of Ming.

Figure 4 is a diagram showing the operation of the Ming Dynasty.

Figure is a diagram showing the operation of the Ming Dynasty.

Figure 6 is a flock diagram showing the formation of the network body in the two states of Ming. Good to implement Ming:

Next, a detailed explanation will be given regarding the implementation of the Ming.

Referring to 3, there are multiple network networks 1 to 3 which are a relay network 1 capable of communicating with a network and the Internet area 1 and a network "AN" in a home office or the like and capable of communicating with a net frame that is a floating cast domain. , And multiple network frames connected to the network 1 to 3 and network frames generated from 3 to 5 of the network 1 to 3 are connected to another network via the relay network. Network 1 to 3 Tunneling Includes multiple frame processors 2 to 22 that transform, copy, and discard frames as necessary.

The network 1 outputs the packets received from the plurality of frame processing devices 2 to 2 connected to it, to the destination specified in the packet. A dress is used to identify the frame processing devices 2 to 22.

Cull networks 1 to 3 receive frames received from 3 to 35 frame processing devices 2 to 22 connected to them.

The first specified in the frame. 3 to 35 ahead An AC dress is used to identify the REM processing devices 2 ~. The MAC address includes a last address that represents 3 to 35 frame management devices 2 to itself, and a broadcast address that represents 3 to 35 frame management devices 2 to 22 connected to the oral networks 1 to 3. There is a multicast address to represent. Broadcast stored addresses Multicast addresses are also called broadcast addresses.

The network consists of an AN access point, radio waves, and cables, which specifically learns MAC addresses to perform efficient frame transmission and switching, and wireless and wired transmission.

3 to 35 are the points of the oral network to 3, which are N C N e w e f a e Ca d) parts (without each). The N Cs of 3 to 35 hold the AC address used in the oral network 3 and send and receive net frames to and from the oral network 3. The NC unit discards the net frames received from the oral networks 1 1 to 3 but the MAC address is the last address and is not the MAC address of its own. On the contrary, the AC dress of the frame transmitted from N C section to oral networks 1 to 3 is always the AC dress owned by itself.

The frame processing devices ~ 22 are the processing units 2 2 and 22, the capsule 2 2 21 22, the filters 2 3 2 and 2 3, the capsule 2 2, the table 5 2 25, and the DN C 2 6 6 226 2 7 respectively. It is equipped with 21 7 227.

The table 2 5 2 225 of the frame processing device 2 to 22 holds in advance a set of a mouth address, a moat address and a tunneling address. Where the tunneling address is the frame to tunnel to It is a dress assigned to the network side of the processing devices 2 to 22, and the mouth address is a MAC address of 3 to 35 connected to the car networks 1 to 3 under the frame processing device 2 to 22. The address is a 3 to 35 AC address that connects to the Cull networks 1 to 3 under the framing device 2 to 2 separated by the tunneling address.

Frame 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2

It finds 225 mote addresses, generates each frame with the AC address of the frame replaced by each one of the mouth addresses on one of the selected pairs, and sends each through NC 2 26 to the mouth network 1 ... , The net frame whose input MAC address is out of the broadcast address is sent through NC 26 to oral network 1 ~.

Here, the dress is not changed even if the upper layers of the science units 2, 1, and 2 are. As a result, there is a case where a net frame in which the AC address is the cast address but the address is the broadcast address or the multicast address is created and transmitted. This is to prevent the packet of the address from being processed by the cast address, which is supposed to be delivered by the multicast address in the case of information premised on the use of multicast. If there is no such possibility, the address may be converted into the cast address.

Fill 3 213 2 3 of Frame Processor ~ 22 shows the MAC address of the frame for the data link frame received from Mouth Caltower 1 ~ 3 via NC 2 2 26 as Table 2 5 2 225 moto ads , And the matching MAC address is found, and the MAC address of the frame is the broadcast address and the MAC address of the frame is used to search the card address in Table 2 5 2 225 above. If such a set exists, the frame is output as capsule 2 4 2 22 and the other frames are discarded.

Capsule 2, 2 and 22 of Frame Processors 2 to 22 receive the encapsulated packet from the relay network through NC 2 7 2 7 and 7, encapsulate the packet and restore the net frame, and process the frame. 2 2 Output.

The cells 2 4 24 of the Frame Processors 2 to 2 are assigned to the frames of the frame if the MAC address of the manual frame is a broadcast address.

Search for full 2 5 1 225 CAL addresses using the AC dress as the matching upper pair of tunneling addresses.

Make a dress Make a top ket cell. capsule

4 2 4 searches the remote address of the frame address in Table 2 5 5 using the frame's MAC address transmission AC address as the frame if the input frame's AC address is not a broadcast address, and tunnels the matched pair. Ket capsules with the address as the address, and each packet is sent to the transit network 1 via NC 277. However, if multiple pairs with the same tunnel address match, each packet is not sent to, but is sent once. With this work, the oncoming flare. Cellular devices and child cuff cells used in each of the cuff cells 2 4 2 22 cells 2 2 2 2 to allow multiple packets of 2 to 22 packets to be transmitted.

It may be one of PE heeve HTT PS hee Ove P ec TP E eev DP E e Ve TCP. Capsule 42, 2 Capsules 2 12 2 2 form a tunneling part. The NC 6 16 226 of the frame processing devices 2 to 22 are connected to the oral networks 1 to 3, and the NC 2 7 1 7 27 are connected to the relay tower. NCs 2 and 2 622, which are respectively connected to the oral networks 1 to 3, hold the MAC address used in the oral networks 3 to 3, and

The net frame received from 2 is transmitted to the mouth Cal-network 1 1 to 3 and the net frame received from the mouth Cal-network 1 to is transmitted to the fill 2 3 213 2 3 N C 2 7 2 7 27, which is connected to Network 1, retains the address that is used in the transit network and transfers the packet between tunneling and the transit network.

Next, referring to ,, and 5, the operation of this embodiment will be described in detail.

, 32, 33, 34 to form one group, the frame processing device, 2, 2 and the table 2 5 2 2 5 store the following data in advance.

Table 25 of Frame Processor 2 has 3 AC dresses 32 AC dresses, Frame Processor 2 dresses and 3 MAC dresses a, 3 MAC dresses d, frame as the cal address, mote address and tunneling address. Memorize three sets of a dressing device, three MAC dresses a, three MAC dresses e-frame dressing device 22 dress J. Frame Processor 2 Table 25 has 32 MAC dresses c, 3 MAC dresses a, Frame Processor 2 dress A and 3 AC dresses, 34 AC dresses as the cal address, motor address and tunnel address. e, dress C in frame device 22 and 3 in MAC dress d, 3 in MA C dress a Stores four sets of dress A of frame processing device 2, MAC dress d of 33, AC dress e of 3, and dress C of frame processing device 2.

The table 225 of the frame processing device 22 shows the MAC address e of 34, the MAC address a of 3 and the P address A of the frame processing device 2 and the MAC address e of 32 as the cal address, the mote address, and the tunneling address. Memorize three sets: AC dress, frame dress 2 dress, 34 AC dress e 3 AC dress d, and frame dress. The operation of this embodiment will be described assuming that the above settings have been made.

First, the operation when a net frame in which the AC dress is the AC dress c of terminal 3 is transmitted from 3 will be described in detail.

Sends a net frame with the AC dress as the AC dress c of terminal 3, the net frame is received by N C of frame device 2 and output to filter 2 (S of 5).

Filter 3 inputs the frame. Since the AC dress is not a broadcast address (step S, the filter uses the AC address of 2 in the frame, the AC dress of 2 and the AC address of 3 in the transmit MAC dress, a, as shown in Table 25. Search (step S): Filter 2 finds a cell in the frame because it finds a set of 3 MAC dresses a, 3 AC dresses c, and Frame Processor 2 dresses.

Output (Step S

The capsule 124 inputs the frame. The MAC address of the frame is not a broadcast address, so Capsule 2 4 is the MAC dress of 3, which is the AC dress of the frame, and the transmit MAC dress. Search for the cal address remote address in Table 25 with MA address a of 3. Then, a set of 3 MAC dresses a, 3 MA dresses c, and frame processing device 2 dresses is found, so that Capsule 2 uses one bucket cell whose frame is the dressing of frame processing device 2 and then NC 7 Output (STEP S 4)

N C 7 inputs and relay network 1 sends it (step S 5)

The network sends the two frame equipment specified as the dress.

Receives two frame processing devices at N C 7 and outputs this to cell 2 (S in step 4)

Capsule 2 outputs the frame obtained by decapsulating the packet to processing unit 2 (step S).

Since the SCI frame is input and the AC address is not a broadcast address, the frame is output by N C 16 S3) N C transmits the input frame by oral network 2 Step S

Cull network 1 transmits 3 frames, which is the MAC address of the received frame.

Thus, if 3 sends a frame with the MAC address as the AC dress c of terminal 3, 3 receives the frame. This is also the case when 32 sends a netframe with the MAC dress as the MA C dress a of terminal 3, and 3 receives the frame.

Next, a detailed description will be given of the operation when the AC frame is transmitted from 3 as a net frame having a broadcast address (broadcast address or multicast address). When a net frame with the MAC address as a broadcast address is transmitted from the network frame, the net frame is received by NC 26 of frame processing device 2 and output to filter 2 3 (step S of 5). Human power. Since the MAC address is a broadcast address (step S, fill 3 retrieves the cull address in table 5 with MAC address a, which is the frame's MA C dress, as step S 6.). RES a, 32 MAC dresses c, frame processor 2 dresses and 3 MAC dresses a, 33 MAC dresses d, frame processor 2 P dresses, 3 MAC dresses a, 3 AC dresses, frame processor Since a pair of dresses C is found, the filter outputs the frame capsule 2 4 (step S 7

The capsule inputs the frame. Since the MAC address of the frame is a broadcast address, Capsule 2 searches for a full 5 cal address with an AC dress a of 3 that is the frame's MA C dress. Then 3 AC dresses a, 3 AC dresses, 2 frame dressers, and 3 AC dresses, 33 MAC dresses d frame dressers

You can find three pairs of dresses, 3 MAC dresses a, 3 MAC dresses e, and Frame C dress C. Since the tunnel address is one of the frame processing device 2P dress and the frame processing device 2 dress C (STEP S 8) capsule

Is a capsule with two dresses as the frame and two as the dress C of the frame processing device 22 and outputs N C 7 for each of them (step S 9)

NC 2 7 uses two P's manually and relays each 20 Send (step S2)

Network 1 sends P-Ket designated as dress to Frame Processor 2 and sends K-ket designated as Dress C to Frame Processor 22, respectively.

The frame processor packet is received by N C 7, and this is output as capsule 2 2 (step S of 4).

Cell 2 2 outputs the frame that encapsulates the packet and restores it to processing unit 2 (step S2).

The Ribe frame is manually input. Since the AC dress is a broadcast address (step S), the science department 2 searches for the motoaddress of the table 25 with the AC dress a of 3 which is the MAC dress of the frame as a step (step S5. The MAC dress of 32). , 3 MAC dress a frame A of dressing device 2 and 33 AC dress d, 3 MAC dress a, 3 dress A of dressing device 2 of dress A are found (step S, Generate one of the frames whose AC frame has been changed to that of terminal 32 by changing the AC dress of the terminal 32 to that of terminal 3 (step S7), and output each frame as NC 2 6. Each input frame is transmitted by the oral network 1 (step S8)

Cull network 12 transmits each received frame to each terminal 32 33. 3 3 receives each frame.

On the other hand, the frame processing device 22 receives the packet at N C 227 and outputs it to the capsule 22 (step S of 4).

The capsule 1222 outputs the frame obtained by decapsulating the packet to the processing unit 22 (step S2).

Science Department 22 Enter the frame. Since the AC dress is a broadcast address (step S3), the management unit 22 and the frame MAC The MC address of table 2 is searched using MC dress a of 3 as the dress (step S). Management part 2, 34 MAC dress e, MAC dress a, Frame processing device 2

Since a pair of dresses C is found (step S), the AC address of the frame is converted into the AC dress e of terminal 3 to generate a frame (step S 7) which is output as N C 2 6. N C 2 sends a human-powered frame to oral network 13 (step S8)

Cull network 1 sends 4 frames, which is the address A of the received frame. 3 receives the frame.

As described above, the broadcast frame sent from 3 is received at each of 33 and 3, which is the end of the table 25 where the mote addresses c, d, and e are stored. Although this frame is also received, there is no problem because it is connected to the same Cull network 1.

Next, a detailed description will be given of the operation when the net frame with the MAC address as the broadcast address is transmitted from 31.

When a net frame with the MAC address as the broadcast address is transmitted from 3, the net frame is received by N C 2 of the frame management device O (step S) and output by filter 2. The filter powers the frame. Since the AC dress is a broadcast address (step S, the filter 3 searches for the cull address in table 5 with the 3 MAC dress b, which is the MA C dress of the frame (step S 6). Is not found (step S7), the filter discards the frame.

As described above, according to the present embodiment, 3 to 35 V'AN or tunneling unusable through the transit network 1 that cannot directly receive the data link frame can directly receive the data link frame. . Furthermore, according to the clarification, for other unacceptable fate, It is possible not to process the child link frame transmitted via the network.

Next, the implementation of Ming will be described in detail with reference to the surface.

With reference to, the same as the implementation of the present invention, except that the upper end 36 is connected to the relay network 1 capable of communicating by the Internet area packet of the present embodiment.

3 is an NC 37 connected to the transit network 1, a capsule 36 that takes out a netted frame from the NC that is manually put into the cell, and a capsule 3 that outputs a netframe and outputs the NC 37 as a packet. With. N holds the 1 P dress G AC dress that is used in the transit network. With this configuration, 3 is recognized by the frame processing devices ~ 22 as having the same structure as the frame processing device.

Further, in this embodiment, the table of the frame processing device 2 has three AC dresses a as the cal address moto address and the tunneling address, an AC dress c, a frame dressing device 2 P dress, and three AC dresses. Dress a, 33 AC dress d, flame dress 2 dress, 3 MAC dress a, 3 AC dress e flame dress 22, dress C, 3 AC dress a, 3 MAC dress, 36 dress Remember the G pair.

The frame management device table has three MAC addresses, three MAC dresses, three frame MAC devices, three MAC dresses, three MAC dresses, three MAC dresses e, and three frame addresses as the cull address, the motor address, and the tunneling address. Processor 2 dress C and 33 AC dress d, 3 MA C dress a, frame 2 Processor A dress A and 33 MAC Dress d, 34 MAC dresses, frame machine 22 dress C and 32 AC dresses c, 36 MAC dresses, 3 1 dresses G, 3 MAC dresses d, 3 MAC dresses 3 1 Memorize 6 pairs of P dress G.

Table 225 of Frame Processor 2 has 3 MAC dresses e, 3 MAC dresses as a Cull Address, Mote Address, and Tunneling Address a Frame Machine 2 Dress A and 3 AC Dresses, 32 AC Dresses. Memorize the following sets: frame dressing 22 dress, 34 MAC dress e AC dress d, frame dressing machine dress and 34 AC dress e, 3 MAC dress g, dress G.

By this, by the same reason as in the above-mentioned implementation of Ming, 36 is 3 of the same group in Cal network ~ 3.

3 and 3 This configuration, which allows direct communication using netframes, enables direct mote access from a home-made C or other 3 to a terminal in its own garden.

Although the implementation of the above has been explained, it is not limited to the above examples, and it is possible to make such changes. In addition, the clear frame processing device can realize its function as hardware by using CompiProv. The probe is recorded and provided on a computer such as a magnetic conductor memo, is read by the computer when the computer is lifted, and the computer controls the operation of the computer. It functions as a frame processing device in the above-mentioned state and executes the processing exemplified in 4 and.

Claims

For the child tarin frame whose address from the desired network is broadcast, the address of the child tarlink frame is replaced with each of the upper address of the data link frame. A frame processing method characterized by converting to the data link frame above and outputting to the second network. 2. Network frame The received frame packet is received, and the received network packet is encapsulated to obtain the child link frame. 3. For the data link frame whose address is outside the broadcast address, the frame processing method is characterized in that it is output to the network 2 as it is.

・ For the data link frame received from the network of, the address transmission address set of the data frame matches the predetermined address transmission address set, and the address of the child Tallin frame is the broadcast address. Yes If the address matches the specified destination address above, the data link frame is enabled and the other data link frame is discarded.

If the valid data link frame address is a broadcast address, the network packet capsule on 1 that has the above tunneling address defined for the address of the Tallin frame as an address, If the valid child address is not a broadcast address, the address of the data link frame The network packet capsule whose address is the tunnel address defined for the set of transmission addresses,

Each packet is transmitted to the above network, or 5 frame management methods. 5.Cal address, which is the last data link address connected to the network 2 of the network and is connected to the network 2 of the above, is the last data link address that is connected to the cal network under the tunneling device. Mote address A frame management method in a frame management device equipped with a table section that holds a set of a tunnel address and a network address assigned to the network side of the tunnel device.

a network cell of a received network packet

Encapsulating received network packets to obtain child link frames,

b) If the address of the child talin frame obtained in step a is a broadcast address, search the previous mote address of the full part using the address of the data link frame,

Replace the address of the child link frame with each of the previous address on the matched set and generate the above frame and send each to the network,

If the address is a data link frame that is not a broadcast address, the step of transmitting to the network 2 as it is,

Received the network data link frame for C 2,

Address of transmitted data link frame Pre-motor address of front table part If there is a group that searches and switches the above-mentioned cull address, and if the address of the child link frame that has received is a broadcast address, the pre-cal address of the above-mentioned full part is used as the address. Search and

If there is a pair to be switched, the child link frame is enabled and in other cases, the data link frame is discarded.

) If the address of the child link frame validated in step c is a broadcast address, the previous address of the table is searched using the address of the talin frame,

Network packet cell whose address is the tunneling address of the pair of

If the address of the data link frame validated in the step C is not a broadcast address, the address of the data link frame is used as the address transmission address to search the previous mote address of the table section, and the cull address,

Network packet capsule whose address is the previous tunnel address of the set

A frame processing method comprising the step of transmitting each packet to the network of the above 1.

The data link frame is a frame, the network packet is a packet,

The address is a broadcast address multicast address of the net,

The front address of the table section The moat address is an A C address,

The front tunneling address of the table is a dress, and the network is an intranet capable of forwarding packets. Internet,

The second Towow is a frame handling method of 5, characterized in that it is capable of transferring Nets frames or is a wireless'AN.

7 ・ Step d Capsule expression and child capsule used in step a, e P, e e v e HTT S h e e v e e, ”T, e e

“UDP,” “The frame management method of 5 or the above characterized in that it is a deviation of P. 8. For the data link frame in which the address from the network is the broadcast address, Address of the child child link frame is replaced with each of the upper address addresses of the child link frames, which is converted into the upper child tarin frame and is output to the second network. Characterized frame processing device.

9. The frame processing device according to claim 8, further comprising a cell unit for receiving the network packet received by the network cell and encapsulating the received network packet to obtain the data link frame.

1 ・ The frame processing device of 8 or 9 is characterized in that the data processing unit outputs the data link frame whose address is not the broadcast address to the network as it is.

・ For child link frames received from the second network, a set of Talin frame address transmission addresses is predetermined. Data frame is valid if it matches a set of sending addresses, and if the address of the child link frame is a broadcast address and the address matches the specified sending address. Filter that discards the data link frame If the address of the valid data link frame is a broadcast address, the above network packet capsule whose address is the upper tunneling address defined for the address of the data link frame , If the valid data link frame address is not a broadcast address, a network packet capsule whose address is the tunneling address defined for the set of data link frame address transmission addresses. To Capsules unit for signal over click

A frame processing device with 9 or 12 features. 2) Network 2 In the frame equipment connected to the network

Cull address, which is the last data link address to connect to the above-mentioned 2nd network, is the last t-link address that is connected to the cull network below the tunneling device, and mote address, is the network address assigned to the network side of the above tunneling device Table that holds a pair with the tunneling address that is

A child cuff cell part that receives the network packet encapsulated in the above-mentioned network and encapsulates the received network packet to obtain a child frame.

If the address of the child talin frame obtained in the encapsulation part is a broadcast address, the previous mote address in the table part is searched using the address of the data link frame, and The above frames are generated by substituting the address of the child talin frame by each of the cal addresses of the above, and each frame is transmitted to the network of the above 2. If the address is a child link frame that is not a broadcast address, Of the network,

When a child link frame is received from the above-mentioned 2nd network, the address of the received data link frame is used as the sending address, the previous motor address of the full section is searched, and if there is a matching set, and If the address of the received data link frame is a broadcast address and the address is used to search the previous address in the table section, and if a matching set exists, the data link frame is validated and in other cases, the data link The filter that discards the frame

When the address of the data link frame validated by the filter unit is a broadcast address, the previous address of the table unit is searched using the address of the data link frame as the matching tunneling address of the matched upper pair. The above work packet capsule whose address is the address of the data link frame, if the address of the data link frame validated by the filter section is not a broadcast address. The network packet capsule that searches the address and uses the set of pre-tunneling addresses as the address, and the cell part that sends each packet to the network.

A frame processing device characterized by being equipped. 3.The data link frame is a net frame, the network packet is one packet,

The above address is a broadcast address multicast address of the net. Front address of table part The above-mentioned remote address is MAC address,

The front tunnel address of the full part is a dress, and the network is an intranet or an internet capable of transferring packets.

The above-mentioned 2 networks are capable of transferring net frames or are wireless ANs. 1 capsule part and cell formula and capsule used in the capsule part, e e v e HTT PS E e e O v e P e T P E h e e

UD h e e O v e C is one of the frame processing devices of 1 or 13. 15.Compile

For a data link frame whose address from the other network is a broadcast address, replace the address of the data link frame with each of the above store addresses specified in the address of the data link frame. A ram for functioning as a stage for converting to a data link frame and outputting to the network.

・ Compile

In addition, 15 programs for functioning as a capsule stage that receives the network packet encapsulated in the network and cell the received network packet to obtain the child link frame. 7. The program of 15 or 1 characterized in that the data link frame whose address is out of the broadcast address is directly output to 2 networks.・ Compile

Furthermore, for a child link frame received from the network, if the set of address transmission addresses of the data link frame matches the predetermined set of address transmission addresses, and if the address of the data link frame is broadcast. If it is an address and the address matches the specified sending address on 1, the data frame is enabled, and in other cases, it functions as a filter stage that discards the data link frame,

If the valid data frame address is a broadcast address, the upper tunnel packet address defined for the data link frame address is used as the network packet capsule. The valid child data frame address is If not a broadcast address, a network packet capsule whose address is the tunnel address defined for the set of address transmission addresses of the data link frame, and each packet functions as the capsule stage for transmitting the above-mentioned network.

1 or 1 7 programs for.

・ Network 2 which is connected to the network and is the terminal address that is the Tallinn address that connects to the network, the remote address that is the data link address that is connected to the Cal network below the tunneling device, and the tunnel address. Has a memory for storing a table holding a pair with a tunneling address which is a tow address assigned to the network side of ,

It functions as a child encapsulation stage that receives the network packet from the above-mentioned network cell and encapsulates the received network packet to obtain a child link frame.

If the address of the data link frame obtained in the encapsulation stage is a broadcast address, the mote address in the table is searched using the address of the data link frame as Generate a frame above 1 by replacing the address of the child link frame with each address and send each frame to the network of 2 above, and if the address is a data link frame that is not a broadcast address, 2 Function as a network communication step,

When a child link frame is received from the network, the remote address of the received child link frame is used as the sending address of the table, the table's mote address is searched, and a match exists, and a pair is found. The address of the selected data link frame is a broadcast address and the full cull address is searched with the address as the address. If there is a pair of pine trees, the data link frame is validated and the data link frame is discarded in other cases. Function as a filter stage,

When the address of the data link frame validated by the filter stage is a broadcast address, the cull address of the table is searched using the address of the link link frame as the address and the tunneling address of the matched upper pair is addressed. If the address of the child link frame validated by the filter stage is not a broadcast address, then the full mote address is searched as the address of the full link address, and a match is made. Before the group Function as a network packet whose address is a packet and each packet is a capsule stage that receives the above-mentioned network.

Program for.

The data link frame is a net frame, the network packet is a packet,

The address is a Broadcast Address Multicast Address

The front address of the table is the AC address.

The front tunnel address of the table is a dress, and the network is an intra or an internet capable of transferring packets.

The above program is characterized in that the second network is capable of transferring a net frame or is a wireless "AN".

1) or 2), which is a difference between the capsule stage and the cell type and capsule used in the cell stage, eP, eeve H TT PS hee Ove P ec 2T PE hee UD, and eve TCP. program.